Zach Chasnoff, an organizer for the group, says the movement chose the IRS's filing deadline to call attention to an unfair tax system that favors corporations over citizens.

"A bunch of people wrote checks today to pay their taxes as they should do," said Chasnoff. "And, we wanted to highlight the fact that a lot of these corporations not only get off without paying any taxes a lot of them have negative tax rates, actually fairly substantial negative tax rates," he said.

St. Louis Police officers directed traffic around the scene. While police have clashed with protesters in the past, they made no arrests and issued zero citations .